Dulnuan, H. G., C. V. Garcia, and A. Tirona-Remulla. “Pyoderma Gangrenosum Initially Presenting As an Ulceration of the Ear Lobule”. Philippine Journal of Otolaryngology Head and Neck Surgery, vol. 36, no. 2, Nov. 2021, p. 52, doi:10.32412/pjohns.v36i2.1813.